Writing and drawing device



Oct. 21 1924. 1,512,827

H. DEQUTSCH WRITING AND DRAWING DEVICE Filed July 28, 1925 4Sheets-Sheet 1 Get. 21 1924.

H. DEUTSCH WRITING AND DRAWING DEVICE Filed July 28 4 Sheets-Sheet 2Get. 21 1924. 1,512,827

H. DEUTSCH WRITING AND DRAWING DEVICE Filed July 28. 1923 4 Sheets-Sheet5 m i Z1 6 H. DEUTSCH WRITING AND DRAWING DEVICE Filed July 28. 1923 4Sheets-Sheet 4 h lll Oct. 21 1924.

Patented Oct. 21, 1924.

NITED STATES HERMANN DEUTSCH, F BERLIN-LICHTERFELDE, GERMANY.

WRITING AND DRAWING DEVICE.

Application filed July as, 1923. Serial No. 654,387.

i To all whom it'may concern:

Be it known that I, HERMANN DEUTSCH, residing at 11 Marienplatz,Berlin-Lichterfelde, Germany, have invented certain new and usefulImprovements in Writing and Drawing Devices, of which the following is aspecification.

Writing and drawing devices are known in which a diaphanous sheet ofpaper, fabric or the like is arranged above a dark-colored slightlyadhesive, bottom layer. consisting of beeswax, paraflin wax or the like,and in. which the writing or drawing is produ"ed by pressing the papersheet or the like against the adhesive bottom layer along the parts orlines to be made conspicuous by means of a style, so that these partsadhere to the bottom surface and the writing or drawing is thus made toappear in the color of the bottom adhesive surface. To obliterate thewriting or drawing in the known devices the impressed sheet of paper orthe like is simply lifted bodily from the adhesive bottom surface.

This invention relates to a writing and drawing device in which themarks are produced in the same manner as in the aforesaid device, but inwhich it is not necessary to lift the sheet of paper or the like fromthe adhesive surface into which parts of the paper have been impressedby the style. By this means the durability of the devi"e is increasedand an improved construction is obtained.

In accordance with the invention an obliterating device in the form of astrip, string, wire or the like extends across the writing tablet and islocated between the adhesive bottom surface'and the sheet of paper andthe like and is arranged so as to be movable relatively to the paper andso that when it is moved it\ separates the adhering parts of the paperfrom the adhesive surface and thus obliterates the marks, writing,drawing .or the like that were produced by the impressure of the paperinto the adhesive layer.

In a preferred form of the writing and drawing device according to theinvention the adhesive bottom surface or layer with its superimposeddiaphanous paper sheet or the like is arranged in the form of a unitadapted to slide in a fiat case similar to a camera plate holder whosefront wall has an opening or window through which the tablet is visible.The tablet is arranged so that it can be drawn out almost entirely fromthe case like the cover of a camera plate holder. Arranged in theinterior of the case so as to extend parallel to its open edge, and inthe neighbourhood of this edge, is a strip or thread of any preferredmaterial which passes between the paper sheet and the adhesive layerbeneath it, so that when the .writing and drawing tablet, consisting ofthe adhesive bottom surface wit a paper sheet or the like stretchedthereupon, is drawn out of the case, the obliterating strip or thread,by moving relatively to the writing tablet, separates the adhering partsof the sheet from the adhesive layer beneath it, thus causing thewriting or drawing on the tablet to be obliterated. When the writingtablet is then pushed back into the case its surfa"e, which isaccessible through the window or opening in the front wall of the case,is ready for renewed use.

The writing device according to the invention may comprise a transparentprotective sheet of flexible material, such as a film of celluloid orcellulose acetate composition, superimposed upon the paper sheet or thelike. The style by whi"h the impressures are made is then applied to theprotective sheet instead of the paper sheet and the wear and tear towhich the paper sheet is subjected is thus considerably lessened.

In this modification the Writing tabletconsists of the adhesive bottomsurface and two superimposed sheets one of which is of paper and theother of transparent protecting material. The obliterating device isagain arranged between the adhesive bottom surface and the paper sheetwhich is covered by the protecting sheet.

A writing and drawing device according to the invention in the form of afiat case like a camera plate-holder may comprise a case with windows oropenings in its two opposite walls between which tablets arranged to bewritten upon on both sides are placed, or which embrace two writingtablets placed back to back in the case Another feature of the inventionconsists in mounting the writing tablet upon a metal plate so that thelayers of the writing and drawing tablet always lie smoothly upon oneanother since the metal plate cannot become warped. The obliteratingmember interposed between the paper sheet and the adhesive bottomsurface may be arranged so that it can be drawn out of the flat casedrawing tablet partly drawn out of its win dowed case, and

Fig. 2 is a longitudinal section of Fig. l on the line 11-11 and Fig. 2is a partial section similar to Fig. 2 on an enlarged scale.

Fig. 3 is a cross section of Fig. 1 on' the line TIL-III,

Fig. 4.- afront View of a writing device with atab et provided with. twowriting surfaces,

Fig. 5 a longitudinal section on the line V-V. and

Fig. 6 arear view of the case of Fig. 4 with the tablet partly drawn outand its top portion broken away.

Figs. 7 and 8 are a front view and a longitudinal section on the lineIXIX respectively of a writing device consisting of a case with twopockets and a writing tablet in each pocket.

Figs. 9 and 10 are a front view and a longitudinal section of anothermodification in which the obliterating device may be moved up and downbetween the paper sheet and the surface beneath it.

Figs. 11, 12 and 13 are a front view. a longitudinal section on the lineXII-XII. and a cross section on the line XIIIXIII respectively ofanother modification.

Fig. 14 is a front view and Fig. 15 a longitudinal section on the lineXV-XV of a writing device with a removable obliterating member andwriting tablet.

Fig. 16 is a View of the parts of the device according to Fig. 14 whentaken apart.

The writing and drawing device shown in 1. 2, 2- and 3 comprises aflatcardboard of metal case a whose edges are stiffened and held together byfolded metal strips 5, one edge being left open for the introduction ofthe writing tablet. This tablet consists of a bottom plate 0 coated withbeeswax, paraflin. wax or the like and having a sheet of paper stretchedover it, the paper sheet being covered in turn. by a sheet 6 oftransparent celluloid, cellon or the like. The bottom plate 0 isconnected to the impressible sheets d, e at the top and bottom edges 7'and g respectively by means of thin metal strips folded over the edgesas indicated in the drawing. When the writing tablet 0. (Z. c is pushedinto the case the top surface of the protecting sheet 6 is accessiblethrough the opening or window h in the front wall of the case a so thatmarks can be produced by impressing the surfaces 6, d against theadhesive botof Fig. t

tom surface by a style or the like. Near the top open edge 2' of thecase a an obliterating member, in the form of a wire or thread 70, isarranged which extends from the one lateral edge of the case to theother and is inserted as shown more clearly in Fig. 8 between the lowerplate 0 and the superimposed sheet of paper a l. Instead of a thread anarrow strip of cardboard paper, metal or the like may be provided.

When marks have been made by a style or the like on the tablet in thecase a these marks may be obliterated by simply drawing the writingtablet 0, d 6 out of the case as indicated in Fig. 1. member or thread70 then travels a ong the bottom adhesive surface and separates theadhering parts of the paper d from the adhesive surface. thus causingthe visible marks on the tablet to disappear. The manner in which theobliterating member is operates to separate the paper sheet from thebottom plate 2' is illustrated in. Fig. 2 in which the parts are shownlarger than their natural sizes.

The interior surface Z of the back Wall of the case a, which becomesvisible when the writing tablet is drawn out, may advantageously bearranged for the recording of temporary or permanent notes, or forprinted impressions such as advertisements or the like.

The flat case a, in the shape of a camera plate-holder, could also bearranged to re ceive a picture post card or a picture of any kindbeneath the writing tablet, c, d, e, which said card or picture could bearranged to be withdrawn from the case by itself.

The protective sheet 6, instead of being arranged to move with thetablet, could be fixed in the case so that the bottom plate 0 with thepaper sheet d only is arranged to be drawn out of the case.

The modified device shown in Figs. 4-6 differs from that shown in Figs.l3 only in the case (1 having windows or openings h, h in both of itswalls and in a writing tablet having a bottom plate 0 coated on bothsides with layers of paraffin wax or beeswax above each of which papersheets d and a protective sheet 6 is stretched. In a writing and drawingdevice of this kind two obliterating strips in are provided at the twoopposite sides of the bottom plate 0. The writing and drawing plate asshown in Figs. t-6 has two impressible sides and when the tablet isdrawn out of the plate 0 marks made on both sides of the plate areobliterated simultaneously.

In the modification shown in Figs. 7 and 8 the case a" is similar to thecase a, of Figs. l6 except that it has two pockets with two writingtablets arranged back to back in the said pockets so that each tabletThe obliterating and drawing device of this kind is also adapted for useon both sides and the marks on each side can be obliterated separately.The case a" is preferably provided with a middle partition Z whose twosides may be used for recording purposes or printed forms or the like asindicated.

It will appear from the drawings thatyif desired the marks on a partonly of a writing surface may beobliterated by drawing the tablet onlypartly instead of entirely out of the case. The unobliterated portion ofthe record is then retained when the tablet is pushed back into thecase.

In the modification shown in Figs. 9 and 10 the writing tabletconsisting as usual of the bottom plate 0 and the superimposed sheetscl, 6 of paper and protective material. is immovably fixed in the case awhich is provided with metal borders and has a window in its one sidelike the cases described above. In this type the obliterating stripwhose ends project at both sides of the case and are guided thereat insuitably formed slots. can be shifted lengthwise in the case. When marksare to be made on thetablet the obliterating strip 10 is moved into theupper position shown in Fig. 9 and when the marks are to be obliteratedthe strip 70 is shifted downward to separate the paper sheet from theadhesive surface and thus cause the marks to disappear.

The writing and drawing device shown in Figs. 11, 12 and 13 differs fromthe aforedescribed devices in that the writing tablet consists of ametalsheet 0', a comparatively thin card-board sheet 0 placed on themetal sheet and coated with beeswax or paraffin wax or the like, adiaphanous sheet d of paper or the like above the cardboard, and finallya transparent protective sheet 6 of celluloid, cellon or any otherpreferred transparent resistive material. The three sheets 0 cl, e areconnected with the metal sheet a by the top and bottom edges 7 and g ofthe latter being folded back upon themselves as shown in Fig. 12. Anobliterating member 7a in the form of a strip extending from one lateraledge of the case a to the other and parallel to the upper transverseedge 2'. is arranged near said upper edge of the case. The obliteratingmember if is placed between theadhesive layer on the bottom pate c andthe paper sheet (Z superimposed thereon. This writing device is used inthe same way as the device, according to Figs. 13. The metal plate 0 maybe made of tin. aluminum or any other suitable material the onlyimportant point being that the writing tablet itself is carried byametal plate which is not liable become warped and is adapted to resistheat so that the layers c 0'. 6 will always lie smoothly upon oneanother so as to enable.

the tablet to beslid easily in the case.

l nder certain conditions the card-board sheetc couldbe dispensed withand the adhesive coating spread directly upon the metal plate 0 j p Themodification shown in Figs. 1-t, 15 and 16 differs from that of Figsll,12 and 13, in that the metal obliterating strip 73 is arranged to bedrawn out of the casing (1 \Vhen the strip 70" is in position in thecase as shown; in Fig. l4 the two ends of the strip lie in notches minthe metal border d of thecase a so ends of the strip do not projectlaterally beyond the edges of the case a. The one end of the strip 7.2is bent so as to form a loop-shaped handle n and this end at, least isarranged to engage frictionally or clampingly in a notch m of the metalborder 7) so that when the strip k" is in position in. the case a asshown in Fig. 14, it cannot slip out automatically. To enable theobliterating strip k to be readily introduced between the adhesive layer0 and the paper sheet d when it is inserted in the case. the bottomplate of the writing tablet. is provided with anotch 0, while thesuperimposed paper sheet (Z and the protecting sheet 6 have no suchnotches. Hence the front end of the obliterating strip is" will alwaysenter automatically into its proper positionbeneath the paper sheet (i.As shown in Fig. 16 the writing tablet consisting of the parts 0 0 d, 6can be completely drawn out of the case a after the obliterating strip khas been removed. A damaged tablet or injured layers thereof can thus bereadily replaced. After anew or repaired tablethas been inserted in thecase a the obliterating strip 70 is. also reinserted and the writingdevice is then ready for, renewed use.

I claim:- l

1. The combination with-a writing and drawing pad comprising abasecoated on one face with a plastic substance and a tissue sheetsuperposed on said coating, the base with its coating and the tissuesheet differing in color. said sheet beingadapted receptacle. said padbeingreciprocable,in said receptacle transversely to said strip.

2. The combination with a writing and drawing pad comprising a basecoated on one face witha plastic substance and a that the tissue sheetsuperposed on said coating, the base with its coating and the tissuesheet differing in color, said sheet being adapted upon impressure toadhere to said plastic substance'falong the lines of impressure, of acase for said pad, said case c'omprising a windowed four-edged wall anda second four-edged wall joined to the first at three edges thereof, theWriting and drawin surface of said pad being visible throu h thewindowed wall of said case,and a strip interposed'between said base andsaid sheet substantially parallel to the open edge of said case andattached to opposite sides of the latter as and for the purposedescribed.

3. The combintion with a writing and drawing pad comprising a metal basecoated on one face with a plastic substance and a tissue sheetsuperposed on said coating, the base with its coating and the tissuesheet differing in color, said sheet bein adapted upon impressure toadhere to said plastic substance along the lines of impressure, of areceptacle for said pad, the writing and drawing surfaces of said padbeing visible when the latter is in said receptacle, and a stripinterposed between said base and said sheet and attached to oppositeedges of said receptacle, said pad being reciprocable in said receptacletransversely to said strip.

4. The combination'with a writing and drawing pad comprising a metalbase coated on one face with a plastic substance and a tissue sheetsuperposed on said coating, said tissue sheet being held in position byback-turned opposite edges of said base plate, the base with its coatingand the tissue sheet differing in color, said sheet being adapted uponimpressure to adhere to said plastic substance alon the lines ofimpressure, of a receptacle for said pad, the writing and drawingsurfaces of said pad being visible when the latter is in saidreceptacle, and a'strip interposed between said base and said sheet andattached to opposite edges of said receptacle, said pad beingreciprocable in said receptacle transverselv to said strip.

5. The combination with a writing and drawing pad comprising a metalbase coated on one face with a plastic substance and a tissue sheetsuperposed on said coating, the base with its coating and the tissuesheet differing in color said sheet being adapted upon impressure toadhere to said plastic substance along the lines of impressure, of acase for said pad, said case comprising a windowed four-edged wall and asecond four-edged wall joined to the first at three edges thereof, thewriting and drawing surface of said pad being visible through thewindowed wall of said case, and a strip interposed between said base andsaid sheet substantially parallel to the open edge of said case andattached to opposite sides of the latter as and for the purposedescribed.

6. A device of the kind described comprising a case consisting of awindowed four-edged wall and another four-edged wall joined to the firstat three edges and unfastened at the fourth edge so as to leave anopening thereat; a writing tablet extractable from the said case throughthe said opening; said writing tablet consisting of a base plate, aplastic coating on the plate and a diaphanous sheet adapted uponimpressure of the said sheet against the said coating to adhere alongthe lines of impressure; and an obliterating member located between theplastic coating and the diaphanous sheet, said obliterating member beingfixed at two opposite joined edges of the case and extending paralleland adjacent to the unfastened edge.

7. A device of the kind described comprising a case consisting of awindowed four-edged wall and another four-edged wall joined to the firstat three edges except at two opposite notched portions of two of thesaid three edges, the fourth edges of the wall being unfastened to eachother so as to leave an opening at the fourth edges; a writing tabletextractable from the said case through the said opening; said writingtablet consisting of a base plate with a notched edge, a plastic coatingon the plate and a diaphanous sheet adapted upon impressure of the saidsheet against the said coating to adhere along the lines of impressure;and an obliterating member adapted to be inserted in the said notchesand between the plastic coating and the diaphanous sheet.

8. A device of the kind described comprising a case consisting of awindowed four-edged wall and another four-edged wall joined to the firstat three edges except at two opposite notched portions of two of thesaid three edges, the fourth edges of the wall being unfastened to eachother so as to leave an opening at the fourth edges; a writing tabletextractable from the said case through the said opening; said'writingtablet consisting of a base plate with a notched edge, a plastic coatingon the plate and a diaphanous sheet adapted upon impressure of the saidsheet against the said coating to adhere along the lines of impressure;and an obliterating member adapted to be inserted in the said notchesand between the plastic coating and the diaphanous sheet, theobliterating member being adapted to engage with the said walls at theedges of the said notches.

9. The combination with a writing and drawing pad comprising a baseplate coated on both faces with a plastic substance and a tissue sheetsuperposed on said coating on each side of said plate, the plate withits coating and the tissue sheets differing in color and being adaptedupon impressure to adhere to said plastic substance along the lines ofimpressure, of a receptacle for said pad, the writing and drawingsurfaces of said pad being visible when the latter is in saidreceptacle, and a strip interposed between said base and each of saidsheets and attached to opposite edges of said recep-

